| 摘要 |
PROBLEM TO BE SOLVED: To provide a crane load display device capable of omitting wiring without using an expensive multiple signal communication unit, and easily forming a constitution by omitting wiring. SOLUTION: An overwinding detection switch 7 is connected between a ground wire 19 of a load detecting part 9 and the ground. The overwinding detecting switch 7 detects that a hook of a crane reaches an overwinding detecting position, and as its contact gets into an opened condition, supply of power from a power source 15 to the load detecting part 9 is stopped, when a detection load signal of the load detecting part 9 becomes 0 [V]. As a load display part 10A determines that the detection load signal reaches 0 [V], excitation of an excitation coil of a relay 14 is released to close its contact to generate an overwinding alarm.
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